Comfort foods are an individual thing, I like goulash, but it's not in my top 10 comfort foods list.
1 lb very lean ground beef
1 can [28 oz] petite diced tomatoes
3 cups uncooked elbow macaroni
1/4 to 1/2 cup chopped/diced onions - sauteed to light brown
1 tsp coarse black pepper
1 tsp basil [dried]
Brown ground beef, adding onions, pepper and basil when it's almost done.
When beef is fully browned and the onions are clear add the tomatoes with the juice - simmer while the macaroni is cooking.
Cook macaroni as directed on package, drain and add to the meat/tomato mixture.
Serve with freshly baked bread slathered in real butter.